Typewriting machine



, Y BERNARD .1. DOWD, or manual),

they may working position to a position above and in Patented July 28,1925.

UNITED STATES. PATENT OFFICE.

comm, INCL, or new you, N.

CONNECTICUT, ASSIGNOR TO ROYAL TYPEWBI'IEB Y.,' a coaroaa'rrou or NEWYORK.

ryrnwnrrme momma Application filed November To all it may cone em:

chines. In the Royal Standard machine as heretofore marketed the paperis fed-under the platen and held in yielding contact therewith by agroup of rolls mounted in frames which can be adjusted to withdraw therolls from the platen when it is desired to arrange the paper on theplaten. These combined feeding, guiding and pressure rolls cooperatewith pressure rolls which normally hold the paper, after passing around,the

front of the platen, with yieldingpressure on the upper portion of theplaten. Means has heretofore been provided, and as shown in prior patets issued to the Royal Types writing Co pany', Inc., for so mountingthese upper pressure and guide rolls that be moved from their normal orrear of the platen and in rear of the paper table, or to a position ashort distance above;

the platen, and in such mechanism as here tofore used, provision hasalso been made for withdrawing the lower rollsfrom the platen'andsimultaneously elevating the upper rolls.

It has heretofore been proposed to 'so mount the upper pressure rollsthat they may be moved from their normal position on top of the platento a position a considerable distance in front thereof so as to leave aclear space between the pressure rolls and the platen for the insertionand the adjustment of the paper. In one such instance the frame or bailwhich carries the upper pressure rolls was pivotally connected 'at itsrear end to links which were in turn pivotally connected with the sideframe of the carriage in such manner that normally the pressure rollswere held on the top of the platen but which permitted the framecarrying the rolls to be moved forward horizontally to such an extent asto hold the rolls the desired distance from the platen. In such" riorconstruction .sui'tablesprings were em' oyed to hold the roll-carryingframe in eit 1, 1924. Serial No. 747,249.

According to my invention, I so mount the mechanism that theroll-carrying frame is made stronger and more stable and, the.

adjustments may be made with greater facility. I r In carrying out myinvention, I mount theupper pressure rolls on. a rod which is carried bythe, front ends of the side pieces or arms of a roll-carrying frame orbail. The rear ends of these side piecesare firmly connected with each}other by a horizontally arranged rod extending from one side of themachine to the other and the-rear endsof the bail are .pivotallyconnected withthe upper.

ends of links which are, firmly connected at their lower en s by ahorizontally arranged rod mounted to rock in hearings in the carriageframe. Springs are associated with the roll-carrying frame which holdthe rolls with a yielding pressure on the platen when therolls arc inworking position and which i .also hold these rolls in an adjustedposition in front of the platen. These features of the inventiontogether with others will be here- ,inafter more fully described. A I Inthe accompanying draWingsz- Figure 1 1s a side elevation of a portion ofa typewriter carriage with my improvements applied, showing the normal:or workingpo-' SltlOll of the upper pressure rolls by full lines andadjusted positions by dotted lines.

.Fignre 2 is a plan view of the bail or roll-carrying frame showinghowit is con- :nected with its supporting links and. how these links arecross connected.

Figure 3 is a detail view, showing the devices employed for supporting'the rod which connects the bail-supporting links on opposite sides ofthe machine.

Figure 3 illustrates the devices for supporting the links in thecarriage frame.

Figure 4 is a. detail view, in section, illustrating the connectionsbetween the bai1, the links and the carriage frame.

Parts of a typewriter carriage are indicated at A and-B indicates aplaten.

As heretofore, the upper pressure rolls are mounted to slidelongitudinally on a graduated rod C. One of these rolls is in dicated atD and it is mounted to revolve free] on said rod. The rod C is securedbysuita le devices 0 to the front ends of two side-pieces E of the bail orroll-carrying frame and these side .pieces or arms extend from a planeabove t e platen rearwardly to the rear partof the carriage where theyare pivotallyconnected with the upper ends of links F. Preferably thisconnection is nected by a rod or cross barH which main- ,tains a properalinement of the links with each other and with other parts of the mech'anism.

n will be observed that the bail can.

prises four elements, viz, two side pieces, a

front connecting rod C-and a rear connect ing rod G. In this way thebail is made rigid and bending or distortion of the parts is avoided.This is accomplished without placin the rear ends of the bail in contactwith t e carriage frame. as. the mechanism is so constructed that thebail or roll-carrying frame has a fore and aft movement.

In order to support the links on the carriage frame, their connectingrod His mounted in recesses m formed'in the rear edges of the side framepieces of the car: riage and the rod is held in these recesses by yokesN, which are attached to the carriage are so disposed that these frameby'screws n. These yokes' have open parts n to receive the rod H andcurved seats n which fit the rod and thus in connection with therecesses m afford a closed bear'in in which the rod may turn when the lis F are shifted.

In order to hold the pressure rolls on the platen with a yieldingpressure when in working osition, I employ springs K the upper en s ofwhich are connected to studs 7: on the arms E in front of their pivotalconnections with the links and thedower endsof which are connected tostuds is projecting laterally from the yokes N. These springs are whatare known as overthrow springs. Normally, as before stated, the springshold the pressure rolls with ayielding pressure on the platen, asindicated by full lines in Figure 1. When the bail is raised and thrownback out of working po sition the springs are disposed as, indicated bydotted lines at X. When the bail is moved forwardly to the desiredposition with the rolls in front of the platen, the h sprin s K assumethe position shown by dotte lines indicated at Y. The springs adjustedpositions may be easily given to the roll-carryin frame and this ame isprovided with a handle R for convenient use.

When the bail is in normal working position, as shown by full lines inFigure 1, both of the links rest against stops one of g frame supportedby the carriage.

which is an adjustable stop 0. This stop limits the rearwardmovement ofthe bail and ensures that the pressure rolls shall rest properly on theplaten.

When the bail is moved upwardly and rearwardly, in the manner indicatedat X, the studs 7crest on the tops of the links I", the upper edges ofwhich are properly shaped to permit the studs to pass over them and torest thereon in such manner as to hold the bail at the proper angle.

One of the arms E of the bail is provided with a su port P, having alateral projecti'on p w edge of the carriage frame, but when the ball ismoved forwards the support P rides on the edge of the carriage frame andsupports-the front portion of the bail, thus preventing the bail fromdropping too far and avoiding undue strain on the bail should. the handsof the operator bear onthe bail when erasing or at other times.

One of the links F is Q which comes in contact with the upper front endof the associated yoke N and thus limits the forward and downwardmovement of the links. A

While my improvements are designed es provided with a stop ich normallystands above the pecially for use in connection with visible frontstrike typewriting machines of the Royal type, they may be embodied, sofar as some features of my invention are concerned, in machines of otherkinds.

I elaimas my invention 1. In a typewriting machine having a carriage anda platen mounted therein, a bail or roll-carrying frame having a foreand aft movement, with its rear ends pivotal] connected above thecarriage frame wit links which are lower ends to t e carriage and whichare braced at their upper ends by a rod which connects them.

2. In a typewriting machine having a carriage and a platen mountedtherein, a bail Ipivotally connected at their or roll-carrying framehaving a fore and aft movement, comprising side arms, a rod connectingtheir front ends and a rod connecting their rear ends, links pivotallyconnected with the rear ends of the bail above the top of the carriageframe and pivotally connected with the side frame pieces of thecarriage.

3; In a typewriting machine having a carriage and a piston. supportedtherein, a bail braced by a horizontallyarranged rod and which aredisposed above the carriage frame and are pivotally connected with arocking 4. In a typewriting machine having a carriage and a platensupported therein, a bail or roll-carrying frame mounted to move'foreand aft of the carriage and to swing upwardly and'rearwardly relativethereto, and

aving si'de arms the rear ends of which are means carried by the bailnormally out of contact with the carriage frame for supporting the bailwhen it is moved to its forward position.

5. In a typewriting machine having a carriage and a platen supportedtherein, a bail or roll-carryin frame mounted to move fore and aft of te carriage having side arms connected and braced at their rear endsabove the carriage, links ivotally connected with the bail and with t ecarriage frame,

and springs for holding the rolls in contact with the platen.

. 6. In a typewriting machine having riage and a platen supportedtherein, a bail or roll-carrying frame comprising side pieces braced atfront and rear and arranged whol- 1y above the top of the carriage,links pivotally connected with the braced rear ends of the side piecesand pivotally connected at their lower ends with the carriage frame.

7. In a typewriting machine having a platen and a carriage in whichit'is mounted formed with recesses or seats at its rear end, a bail orroll-carrying frame mounted to move fore and aft of the machine andpivotally connected at its rear end with links which are connected attheir lower ends to a pivot ro'd seated in the. recesses in thecarriageframe, and means for holding said pivot rod in its seats. 8. In atypewriting machine having a plat'- en and a carriage in which it ismounted formed with recesses in its rear edge, a bail mounted to movefore and aft of the machine which is pivotally connected to the upperends of the .links which at their lower ends are connected by a rodseated in the recesses of the carriage, and yokes attached to thecarriage frame which hold said rod in place. 9. In a typewriting machinehaving a platen and a carriage in which it is mounted, a bailo'r'roll-carryingfframe having a fore and aft movement and connected atits rear ends with the upper ends of links which are cross-connected by.a rod seated in the rear 'ed e of the carriage and held therein b yokeswhich are detachably connected wit the carriage.

In testimony 'whereof, I have hereunto subscribed my name.

BERNARD J. Down.

